On optimal designs of cumulative charges of deep penetration

Abstract

Abstract Purpose. Generalization of the results of the author's research on the influence of the shape of the liner on the mass-kinetic characteristics of the jets, the determination of the ways of the final optimization of the design of the charge, the analysis of the combined effect of the shape and liners materials on the efficiency of the charges Method. The methodological basis of research is a systematic approach to the problem of increasing the efficiency of a cumulative explosion. In accordance with the specifics of research aimed at achieving the set goals and obtaining technological dependencies, physical and mathematical modeling were used in the work. Findings. The results of a comparison of the parameters of the functioning of shaped charges with three forms of liners are presented: conical with an angle at the top of 2α=42º of constant thickness, progressive thickness with an angle at the top of 42º/43º, biconical with angles at the top and base of 38º/50º and 35º/50º and semi-elliptical. In some cases, different detonation excitation schemes were simulated. From a point on the axis of symmetry and around a circle with a diameter equal to the caliber of the charge. A comparison of the simulation results with the data of experimental studies for a short semi-elliptical liner. The results of the penetration depth of shaped charges jets into the barrier according to the A-V model (Allison and Vitali) were compared for a standard charge (2α=42º), biconical and semi-elliptical liners. Originality. Bi-conical and elliptical liners are promising forms of liners of shaped charges of deep penetration, which make it possible to form shaped charges jets that move at velocity greater than the velocity of the jet when detonating a standard shaped charges blow up with a conical liner. As the angle at the top of the conical liner decreases, the instability of the functioning of industrial charges increases and the spread of the penetration depth of the target increases Practical implications. The obtained results are important and useful for the design of equipment and technologies in various fields where the energy of a directed explosion is used: for the disposal and disposal of ammunition, for the opening of oil and gas reservoirs, for the reconstruction of construction facilities, in military affairs.

Keywords

• shaped charge jet
• liner
• detonation
• shaped charge